Oberdorfer N990R Bronze Gear Pump With Relief Valve and Buna Lip Seal
The Oberdorfer N990R is a versatile bronze gear pump engineered for demanding industrial applications requiring reliable fluid transfer at consistent flow rates. This model delivers 23.3 gallons per minute with 1-inch NPT ports, making it ideal for fuel transfer systems, hydraulic oil circulation, and industrial fluid handling where durability and performance are essential. The pump features a factory-installed relief valve that protects the system from overpressure conditions, while the Buna lip seal ensures dependable operation in diverse environments.
Constructed from high-grade bronze, the N990R demonstrates exceptional corrosion resistance and longevity compared to steel alternatives. The pump's self-priming capability allows it to lift fluids from sources up to 20 feet below the pump centerline, eliminating the need for manual priming in many applications. Whether operating in marine settings, industrial processing facilities, or fuel depot operations, the N990R maintains consistent performance across a broad temperature range. The close-coupled design integrates smoothly with various motor configurations, offering flexibility for installations ranging from portable units to permanent installations.
Backed by decades of Oberdorfer engineering expertise, the N990R represents a proven solution for applications requiring dependable, efficient gear pump technology. The integrated relief valve protects both the pump and the system from damage due to excessive pressure buildup, while the robust bronze construction ensures years of reliable service. This pump is suitable for transferring petroleum products, oils, coolants, and other compatible fluids in industrial, commercial, and specialty applications.
Key Features
- Built-in relief valve for overpressure protection up to 150 PSI
- Bronze construction for superior corrosion resistance
- Buna lip seal for reliable fluid containment and durability
- Self-priming capability with 20-foot maximum suction lift
- Consistent 23.3 gallon per minute flow rate
- 1-inch NPT threaded inlet and outlet ports
- Close-coupled design for versatile motor integration
- Operates smoothly at standard industrial speeds and RPM ranges
Applications
- Fuel transfer systems in commercial and industrial facilities
- Hydraulic oil circulation and system replenishment
- Petroleum product handling and distribution
- Coolant and cutting fluid transfer in manufacturing
- Portable and stationary fluid transfer units
- Marine and offshore fuel handling applications
- Industrial machinery lubrication and oil delivery
- Emergency response and mobile pumping operations
Specifications
- Model Number: N990R
- Pump Type: Rotary gear pump
- Flow Rate: 23.3 gallons per minute
- Port Size: 1 inch NPT threaded connections
- Maximum Pressure Rating: 150 PSI with relief valve
- Maximum Suction Lift: 20 feet
- Seal Type: Buna lip seal
- Construction Material: Bronze pump body and gears
- Intake Capacity: Suitable for fluids with viscosity ratings up to ISO VG 68
- Temperature Range: Operates in standard industrial temperature environments
Frequently Asked Questions
Q: Can the Oberdorfer N990R pump be used for marine fuel transfer applications?
Yes, the N990R is well-suited for marine fuel transfer systems. The bronze construction provides excellent corrosion resistance in salt-water environments, and the self-priming capability handles the typical suction lift requirements found on vessels. Many marine operators specify this model for fuel management systems.
Q: What types of fluids can the N990R pump handle?
The N990R is designed for petroleum-based fluids including diesel fuel, heating oil, lube oil, and hydraulic fluids. The Buna lip seal is compatible with standard industrial oils and fuels. Always verify fluid compatibility with the seal material before operating with specialty or synthetic fluids.
Q: Is the N990R pump self-priming, and what does that mean for installation?
Yes, the pump features self-priming capability, allowing it to draw fluids from sources up to 20 feet below the pump's centerline without external priming. This eliminates manual priming procedures and simplifies installation in applications where the fluid source cannot be positioned above the pump.
Q: What is the maximum pressure rating with the built-in relief valve?
The N990R features a factory-set relief valve that protects the pump and system at 150 PSI maximum pressure. This safety feature automatically bypasses excess flow if pressure rises above the rated level, preventing damage to both the pump and connected equipment.
Q: Can I use a variable speed motor with the Oberdorfer N990R pump?
Yes, the N990R can operate with variable speed motors when properly sized and configured. Variable speed operation allows you to adjust the flow rate by controlling motor speed, providing greater flexibility for applications requiring flow rate changes.
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